INPUT,OUTPUT AND STORAGE DEVICES
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The document provides an overview of input, output, and storage devices in computing. It describes various input devices such as keyboards, mice, scanners, and microphones, as well as output devices including monitors, printers, plotters, and speakers. Additionally, it outlines primary and secondary storage devices, detailing their types and functions.
INPUT,OUTPUT AND STORAGE DEVICES
- 1. INPUT,OUTPUT AND STORAGE DEVICES Presented by Abhinav K P Abida Sonam K
- 2. INPUT DEVICES • Input - Any data or instruction entered to computer • Input device helps to communicate with computer • Helps to enter information and issue commands • Examples: Keyboard Mouse Scanner Microphone Joystick Light Pen
- 3. KEYBOARD • Most common and widely used • Made up of buttons called “KEYS” • Keys are arranged to sections: Alphabet keys Function keys Numeric keys Arrow keys Command keys
- 5. MOUSE • Pointing device • Used to control the movement of mouse pointer an to make selections • Types of mouse Optical mouse – ball is replaced by optical system Wheel mouse – contains scroll wheel Cordless mouse – connected to computer using IF or radio signals
- 6. OPTICAL MOUSE WHEEL MOUSE CORDLESS MOUSE
- 7. SCANNER • Light sensing input device • Used to control the movement of mouse pointer an to make selections • Types of scanner: Bar code reader– decodes information contained in bar codes Optical Scanner– converts a documents text or graphics to digital data
- 8. MICROPHONE • Used to input sound that is stored in digital form • Also called as mic • Also lets you to others to communicate with others
- 9. JOYSTICK • Pointing device that works on principle of trackball • Function is same as mouse • It is a stick having spherical balls at both upper and lower ends • Can be moved in four directions
- 10. LIGHT PEN • Used to select a displayed menu item • Draw pictures on screen • Contains a photocell and an optical system • Detects screen location and sends corresponding signal to CPU
- 11. OUTPUT DEVICES • Input - Any piece of computer hardware equipment used to communicate the results of data processing • Converts the electronically generated information into human-readable form • Some types of output are text, graphics, tactile, audio and video • Text consists of characters • Graphics are digital representations of nontext information such as drawings, charts, photographs, and animation • Tactile output such as raised line drawings • Audio is music, speech, or any other sound. • Video consists of images played back at speeds to provide the appearance of full motion.
- 13. MONITOR • Commonly called as VDU(Visual Display Unit) • Main output device • Can display text as well as graphic images • Types of monitor Cathode Ray Tube(CRT)- Flat Panel Display
- 14. PRINTER • Used to print text or illustrations • Made up of buttons called “KEYS” • There are many types of printers: Daisy-wheel Dot-matrix Ink-jet Laser LED
- 16. PLOTTER • Used to draw pictures on paper • Draw lines using a pen • Used in engineering applications • More expensive
- 18. SOUNDCARD & SPEAKERS • Enable the computer to output sound • Allows users to listen to computer generated sound • Speakers are required to listen to music or video CD/DVD sound
- 20. STORAGE DEVICES • Used to store data • Two types of Storage devices: Primary-RAM,ROM Secondary-HARD DISK,FLOPPY etc
- 21. PRIMARY STORAGE DEVICES RAM • RANDOM ACCESS MEMORY • Can read and write • Volatile • Two types DRAM (Dynamic) SRAM (Static)
- 22. ROM • READ ONLY MEMORY • Information stored permanently • Access time is fast • Four types PROM EPROM EEPROM EAROM
- 23. SECONDARY STORAGE DEVICES HARD DISK • Made of aluminium or other metal alloys • Not removable • Several disks are packed together and mounted on a common drive
- 24. FLOPPY DISK • Circular disk coated with magnetic oxide enclosed within plastic cover • Available in different sizes • Data up to 1.4 MB can be stored • Data written as tiny magnetic spots
- 25. OPTICAL MEDIA • Works by creating a disc with pitted metallic surface • Available in different types ranges from 650 MB to 128 GB • CD-ROM - 650 • CD-R -900 • CD-RW -900 • DVD • BLUE RAY
- 26. FLASH DRIVE • Solid state • Plug & play • Portable • More data storage
- 28. QUESTIONS……?????
- 29. THANKS….